Scalable and portable popup worksite system

ABSTRACT

A scalable and portable popup worksite system for work that requires indoor or outdoor workspace isolation from the surrounding elements. In the preferred embodiments, the invention comprises a foldable frame structure, a cover retaining system, and a ventilation system. The frame structure comprises a plurality of foldable wall trusses connecting a plurality of upright telescopic posts transversely forming a wall frame structure and a closed loop geometric footprint, a plurality of foldable roof trusses connecting a centrally disposed roof connector assembly to either the telescopic posts or the wall trusses transversely forming the roof. The cover retaining system comprises a plurality of cover retaining assemblies, spring clips and spring clamps to secure roof and wall cover to the frame structure. The ventilation system comprises an enclosure that can utilize standard furnace air filters and existing air circulation devices. Multiple frame structures can be linked together to scale up workspace.

FIELD OF THE INVENTION

The present invention relates to a scalable and portable popup worksite system that can provide workspace isolation or separation from the surrounding elements. The present invention offers a system that can be quickly set up and dismantled, adjusted in height to accommodate height constrains, scaled up with multiple units and stowed away in compact and space-saving form.

BACKGROUND OF THE INVENTION

In many worksites such as construction and renovation sites, it's inevitable that work activities generate airborne particles, such as saw dust, tile cutting dust, sanding dust, spray painting droplets, etc. The airborne nature of the particles creates difficulties to perform concurrent work activities and work waste cleanup, due to hard-to-control cross-contamination. For example, saw dust and tile cutting dust may contaminate un-dried painting surfaces, while spray painting droplets may contaminate existing finished surfaces. This creates the need for a temporary workspace, in which work waste is contained within the workspace, to prevent cross-contamination to surrounding elements. In other situations, there are needs to protect elements from surrounding airborne particles, such as protecting tools, furniture, un-dried painted parts, etc., from being contaminated by dusts or droplets.

While there are other portable worksites existing in the art, for example, patent Pub. No. US 2020/0230638 A1 and Pat. No. US 2010/0272915 A1, they are limited in the functions of quick and easy assembling/dissembling, and/or compact storage. Due to the temporary nature of the portable worksite, these create their limits. They are also limited in other factors demanded by a temporary worksite, specifically, in the scalability, where larger space is required, and/or the adjustability, where the worksite height must be adjusted to accommodate its external housing constrains.

There are many other portable frame structures existing in prior art in other fields, such as U.S. Pat. Nos. 9,482,026 B2, 7,520,290 B2, and 10,900,249 B2. However, they serve respective objectives in their fields but not for the scalable and portable worksite objectives.

Therefore, there is a strong need for an economical and portable worksite that can be quickly assembled and dissembled, can be easily adjusted in height, can be scaled up with multiple units, and can be stowed away in compact form when the worksite is not needed.

SUMMARY OF THE INVENTION

The primary object of the present invention is to provide a foldable popup frame structure that can be quickly and easily assembled and dissembled, and in compact storage form.

The second object is to provide a roof and wall cover retaining system that can attach existing commercially available plastic sheeting and/or other fabrics to the frame structure, so as to cover the roof and walls to form an isolated workspace.

The other object is to provide capacity of height adjustment when setting up the frame structure, so that the frame structure's height can be adjusted to accommodate its exterior housing constrains, such as a ceiling limit imposed by a garage or a room in which the frame structure is being setup.

The other object is to provide capacity to scale up the workspace by linking multiple units of the frame structure.

The other object is to provide a ventilation system that can utilize a commercial standard furnace air filter to filter airborne particles or droplets, and force air circulation inside the worksite by an existing air circulation device such as a blower fan, or through ducting to other ventilation blowers, or by customization to utilize an existing bathroom exhaust fan and so on.

To the accomplishment of the above and related objects, this invention may be embodied in the preferred embodiments illustrated in the accompanying drawings. It should be noted however, that the drawings are illustrative only, and that various embodiments can be made to achieve the same objectives.

BRIEF DESCRIPTION OF DRAWINGS

Various other objects, features and advantages of the present invention will become fully appreciated and better understood when considered in conjunction with the accompanying drawings, wherein for the preferred embodiments:

FIG. 1 is a perspective view of a scalable and foldable popup frame structure in the deployed position in the first preferred embodiment.

FIG. 2 is a perspective view of two linked frame structures of FIG. 1 for worksite scaling-up illustration.

FIG. 3 is a perspective view of the frame structure of FIG. 1 in a folded position when the worksite is not needed and to be stowed.

FIG. 4 is an exploded view of a frame linkage assembly that may be used to connect two frame structures and form a scaleup worksite.

FIG. 5 is an exploded view of a telescopic post that may be used on the frame structure of FIG. 1 .

FIG. 6 is a perspective view of the telescopic post of FIG. 5 .

FIG. 7 is a perspective view of the telescopic post from the opposite direction of FIG. 6 .

FIG. 8 is a combination of orthographic, sectional and perspective views of a post cap bracket that may be used on the telescopic post of FIG. 5 .

FIG. 9 is an exploded view of a post slider bracket that may be used on the telescopic post of FIG. 5 .

FIG. 10 is a combination of orthographic, sectional and perspective views of the post slider bracket of FIG. 9 .

FIG. 11 is an exploded view of a height adjustor that may be used on the telescopic post of FIG. 5 .

FIG. 12 is a combination of orthographic, sectional and perspective views of the height adjustor of FIG. 11 .

FIG. 13 is a perspective view of a foldable wall truss that may be used on the frame structure of FIG. 1 .

FIG. 14 is an exploded view of the wall truss of FIG. 13 .

FIG. 15 shows a fragmentary illustration of a cover made of clear plastic sheeting is secured by a plurality of spring clips (FIG. 16 , FIG. 17 ) to a plurality of wall truss longitudinal members (FIG. 22 ).

FIG. 16 is a perspective view of a spring clip that may be used to secure a cover to the wall truss of FIG. 13 .

FIG. 17 is a perspective view of the spring clip from the opposite direction of FIG. 16 .

FIG. 18 is a perspective view of a foldable roof truss that may be used on the frame structure of FIG. 1 .

FIG. 19 is an exploded view of the roof truss of FIG. 18 .

FIG. 20 is a combination of orthographic, sectional and perspective views of a roof connector assembly.

FIG. 21 is an exploded view of the roof connector assembly of FIG. 20 .

FIG. 22 is a perspective view of a longitudinal member of the wall truss of FIG. 13 .

FIG. 23-25 are perspective views of various connectors that may be used on the wall truss of FIG. 13 .

FIG. 26-28 are perspective views of various fasteners that may be used to connect the longitudinal members of the wall truss of FIG. 13 .

FIG. 29 is a perspective view of a first longitudinal member that may be used on the roof truss of FIG. 18 .

FIG. 30 is a perspective view of a second longitudinal member that may be used on the roof truss of FIG. 18 .

FIG. 31-32 are perspective views of connectors that may be used on the roof truss of FIG. 18 .

FIG. 33 is a perspective view of a fastener that may be used on various components.

FIG. 34 is an exploded view of a cover retaining assembly.

FIG. 35 is a fragmentary illustration that shows a wall cover made of clear plastic sheeting is secured to the telescopic post via the cover retaining assembly of FIG. 34 .

FIG. 36 is a combination of orthographic, sectional and perspective views of the cover retaining assembly of FIG. 34 .

FIG. 37 is an exploded view of a ventilation assembly.

FIG. 38 is a front perspective view of the ventilation assembly connected to an inner post of the telescopic post of FIG. 5 .

FIG. 39 is an exploded view of a ventilation connector assembly.

FIG. 40 is a rear perspective view of the ventilation assembly.

FIG. 41 is a rear perspective view that shows a blower fan is installed inside the ventilation assembly.

FIG. 42 is a rear perspective view that shows a bathroom exhaust fan is installed in conjunction with the ventilation assembly.

FIG. 43 is an illustrative view that shows a fully configured worksite covered with clear plastic sheeting in the first preferred embodiment.

FIG. 44-45 are perspective and exploded views of a spring clamp.

FIG. 46 is a perspective view of a frame structure in the second preferred embodiment.

FIG. 47 is a perspective view of the connections between a second type roof truss and a second type wall truss that may be used in the second preferred embodiment.

FIG. 48 is a combination of perspective views of a second type post cap bracket that may be used in the second preferred embodiment.

FIG. 49 is a combination of perspective views of a second type post slider bracket that may be used in the second preferred embodiment.

FIG. 50 is a perspective view of a first T connector that may be used in the second preferred embodiment.

FIG. 51 is a perspective view of a second T connector that may be used in the second preferred embodiment.

DETAILED DESCRIPTION OF THE INVENTION

Described below are the preferred embodiments of the present invention, which illustrate ways in which the invention may be implemented. Although the embodiments shown are described in the context of worksite, the invention can also be used for other purposes such as storage. In the descriptions that follow, the first preferred embodiment is disclosed in detail to illustrate the principles of the invention. The second preferred embodiment is also disclosed as an illustration of how the principles can be embodied in different forms. Therefore, it should be noted that the preferred embodiments are merely respective forms of the many potential embodiments, and the structural and functional details described herein are not intended to be limiting of the invention, but merely serve as the exemplary representations and the principles of the present invention.

In the disclosure the same reference characters represent the same elements in all figures. The references of “up”, “down”, “upper”, “lower”, “top”, “bottom”, “vertical”, “horizontal”, “front”, “rear” and so on are based on the positions shown on the views. Terms like “first”, “second”, “third”, “forth”, “last”, “one”, “another”, “on one end”, “on the other end” and so on are used to arbitrarily distinguish the elements in relation to the position and/or the sequence of a description or illustration. On the figures with a combination of orthographic, sectional and perspective views, the reference characters may not be indicated to avoid reducing legibility of the drawing details, however the components will become obvious on the other views. Connecting parts such as nuts, bolts and screws are generally referred to as fasteners.

FIG. 1 illustrates a scalable and portable popup frame structure (referred to as a frame structure hereon) in its deployed position in the first preferred embodiment. The frame structure may comprise a plurality of telescopic posts 100 vertically standing on the ground, a plurality of foldable wall trusses 200 transversely connecting the adjacent telescopic posts 100 to form a closed loop wall frame structure, a centrally disposed roof connector assembly 400, and a plurality of foldable roof trusses 300 transversely connecting the telescopic posts 100 and the roof connector assembly 400 to form a roof. The outermost surfaces of the closed loop wall frame structure define a geometric footprint of the worksite and the telescopic posts 100 define the vertices of the geometric footprint.

FIG. 1 further shows a plurality of cover retaining assemblies 800, which may be independent of the frame structure, installed after the frame structure is set up to attach cover of the wall openings to the telescopic posts 100, and taken off when the frame structure is folded for storage. The frame structure may be popped up from the center without any tools, and covered by readily available sheeting such as clear plastic sheeting. A user may first cover the sheeting over the roof, then wrap the sheeting around the wall openings to form an isolated workspace. The preferred roof in the preferred embodiments is a flat roof; however, in some embodiments a roof peak may be formed. The preferred roof truss connection in the first preferred embodiment is from the telescopic post 100 to the roof connector assembly 400; however, as disclosed in the second preferred embodiment (FIG. 46 ), in some embodiments the connection may come from different part of the wall frame structure to provide like support to the roof and reinforcement to the wall frame structure. The preferred geometrical footprint of the frame structure in the preferred embodiments is a square; however, in some embodiments the geometrical footprint may be a rectangle or a regular polygon. One roof connector assembly 400 is used in the preferred embodiments, however, in some embodiments a plurality of roof connector assemblies may be used.

FIG. 2 illustrates two identical frame structures may be linked together by frame linkage assemblies 900. A user may scale up workspace by linking multiple identical units.

FIG. 3 illustrates the frame structure in a folded and retracted position in the first preferred embodiment. The telescopic posts 100 are retracted and the roof trusses 300 and wall trusses 200 are folded and bunched. The frame structure may be collapsed and folded into compact size for storage and transportation without any tools when not needed.

FIG. 4 illustrates how the frame linkage assembly 900 may be put together in the preferred embodiments. The frame linkage assembly 900 may comprise a bracket 901 and a coupling bracket 902. The bracket 901 may comprise a body having a bracket end sized and shaped to be clamped on the telescopic post 100 and a hinge end having a vertical hinge. The bracket 901 may be clamped on a telescopic post 100 from one frame structure by fastener 903 and fastener 206 on the bracket end. The bracket 902 may comprise a bracket end similar to the connector 901, and a hinge end having a vertical hollow cylinder. The bracket 902 may be clamped on an adjacent telescopic post 100 from another identical frame structure the same way as the bracket 901. The hinge of the bracket 901 may be inserted into the hollow cylinder of the bracket 902 to secure two adjacent telescopic posts 100 from two different units. Two sets of frame linkage assemblies 900 may be used to fully secure two identical units and combine them into one larger worksite.

FIG. 5 illustrates how the telescopic post 100 may be put together in the first preferred embodiment. The telescopic post 100 may comprise a post cap bracket 103, a post slider bracket 500, a height adjustor 600, a tubular outer post 101, and a tubular inner post 102 sized and shaped to be slidably received into the tubular outer post 101 having a plurality of position pin holes on the upper body, whereby the telescopic post may be axially extended and retracted. The outer post 101 may contain an upper position pin hole on the upper body to receive the lock pin 504 from the post slider bracket 500 (FIG. 9 , FIG. 10 ), so as to lock the post slider bracket 500 in its upper position limit. The outer post 101 may further contain a lower position pin hole at the bottom of the body, to axially align with the pin hole on the height adjustor body 601 (FIG. 11 ) and one of the plurality of position pin holes on the inner post 102, so that the lock pin 504 of the height adjustor 600 (FIG. 11 , FIG. 12 ) can engage the aligned position pin holes on the overlapping portion of the outer post 101 and the inner post 102, and set the desired height of the frame structure. The outer post 100 is preferably longer than the longitudinal member 201 (FIG. 22 ) of the roof truss 200 so that when in the folded position the longitudinal member 201 will not interfere with the height adjustor 600. The height adjustment mechanism enables a user to adapt to the ceiling limits in an indoor environment. The post cap bracket 103 may be affixed to the top of the outer post 101 by fasteners 104. The inner post 102 may have a foot pad to form its foundation. The foot pad may have a hole which can be, but need not be, secured to some sort of foundation, such as a ground or a wood foundation.

The preferred tubular shape in the preferred embodiments is a square. However, in some embodiments tubing with various shapes may be used and more than two telescopic post sections may be used to form the telescopic post 100.

FIG. 5 further illustrates how the cover retaining assemblies 800 (FIG. 34 ) may be installed on the telescopic post 100 in the first preferred embodiment. The male mounting clamps 801 may be mounted onto the upper, middle and lower portions of the telescopic post 800 via fastener 804 and fastener 805, after the frame structure is deployed. A user may cover a sheeting over the telescopic posts 100 having the male mounting clamp 801 already installed, then push the female mounting clamp 802 over the sheeting to engage the male mounting clamp 801, so as to secure the sheeting to the telescopic posts 100. The U shape spring clip 803 can be, but need not be, used to further secure the female mounting clamp 802 to the male mounting clamp 801.

FIG. 6 and FIG. 7 show the front and rear perspective views of the telescopic post 100 attached with a plurality of cover retaining assemblies 800, to illustrate the relationship of the components in a deployed position.

FIG. 8 shows the construction details of the post cap bracket 103 in the first preferred embodiment through a combination of orthographic, sectional and perspective views. The post cap bracket 103 may include a capped downward hollow recess consisting of a plurality of walls sized and shaped to receive the top end of the outer post 101, and may be affixed to the top of the outer post 101 by fasteners 104. The post cap bracket 103 may further include a plurality of downward horizontal slots radially projecting outward from the hollow recess, which may include a first, a second wall truss slot and a roof truss slot. The first and second wall truss slots may be oriented lengthwise in accordance to the geometric footprint, and may be pivotally connected to the end portions of two adjacent longitudinal members 201 (FIG. 22 ) projecting upward from two adjacent wall trusses 200 as show on FIGS. 13 and 14 . The roof truss slot may be oriented radially in the middle between the first and second wall truss slots, and may be pivotally connected to the end portion of a first longitudinal member 301 (FIG. 29 ) from the roof truss 300 by fasteners as shown on FIGS. 18 and 19 .

FIG. 9 illustrates how the post slider bracket 500 may be put together in the first preferred embodiment. The post slider bracket 500 may comprise a post slider boy 501, a first pin 502, a spring 503, a lock pin 504, a lever 505 and a second pin 506. The post slider body 501 may comprise a hollow tubular passage having a plurality of walls sized and shaped to slidably receive the outer post 101, whereby the post slider bracket 500 may slide along the outer surface(s) of the outer post 101. The post slider body 501 may further comprise a plurality of upward facing horizontal slots radially projecting outward from the hollow passage on the upper post slider body 501, which may include a first wall truss slot, a second wall truss slot and a roof truss slot oriented in similar way as the post cap bracket 103, whereby the first and second wall truss slots may be pivotally connected to the end portions of two adjacent longitudinal members 201 (FIG. 22 ) projecting downward from two adjacent wall trusses 200 as shown on FIGS. 13 and 14 , and the roof truss slot may be pivotally connected to the end portion of a second longitudinal member 302 (FIG. 30 ) from the roof truss 300 by fasteners as shown on FIGS. 18 and 19 . The post slider body 501 may further comprise a pair of hinge seats on both vertical sides of a wall on the lower body, a pin hole penetrating the middle of said wall above said pair of hinge seats. The horizontal slots of the post slider body 501 may be paired up with the respective horizontal slots of the post cap bracket 103 on the same telescopic post 100 to be pivotally connected to the respective adjacent wall trusses 200 and the respective roof truss 300. The lever 505 may comprise a jaw side having a hollow cylinder hinge seat on its upper body, a pair of hinge seats in the middle and a handle side on its lower body. The lever 505 may be pivotally connected to the post slider body 501 via the hinge 507 and the spring 503, through the pair of hinge seats on the lever 505 and the pair of hinge seats on the post slider body 501, forming a spring clamp structure. The position pin 504 sized and shaped to be received into the pin hole on the post slider body 501 may be pivotally connected to the hollow cylinder hinge seat via the second hinge 506, and axially aligned with the pin hole on the post slider body 501. When the frame structure is in the deployed position, the pin hole on the post slider body 501 is further aligned with the upper position pin hole on the outer post 101 and the spring clamp structure enables the position pin 504 to be automatically engaged with the aligned pin holes. When the handle of the lever 505 is pressed down, the position pin 504 is disengaged, allowing the post slider bracket 500 to slide along the outer post 101.

FIG. 10 further shows the construction details of the post slider bracket 500 in the first preferred embodiment, through a combination of orthographic, sectional and perspective views.

FIG. 11 illustrates how the height adjustor 600 may be put together in the preferred embodiments. The height adjustor 600 may comprise a height adjustor body 601, a first pin 502, a spring 503, a position pin 504, a lever 505 and a second pin 506. The height adjustor body 601 may comprise a hollow tubular passage having a plurality of walls sized and shaped to receive the outer post 101, whereof the bottom end of the passage may have a narrower inward rim sized and shaped to slidably receive the inner post 102, allowing the bottom of the outer post 101 to go through from the top and rest on the rim at the bottom. The height adjustor body 601 may further comprise a pair of hinge seats on two vertical sides of a wall and a pin hole sized and shaped to receive the position pin 504 penetrating the upper middle of said wall. The first pin 502, the spring 503, the position pin 504, the lever 505 and the second pin 506 may be the same as their counterparties on the post slider bracket 500. The lever 505 thereof may be pivotally connected to the height adjustor body 601 in the same way as on the post slider bracket 500, forming a spring clamp structure. The height adjustor assembly 600 thereof may be affixed to the bottom of the outer post 101 via fasteners or suitable bonding agents, and the pin hole on the height adjustor body 601 thereof may be axially aligned with the position pin 504 and the lower position pin hole of the outer post 101 in the fixed position. When the position pin 504 is further axially aligned with one of the plurality of position pin holes on the inner post 102 during deployment, the spring clamp structure enables the position pin 504 to be automatically engaged with the respective aligned pin holes. When the handle of the lever 505 is pressed down, the position pin 504 is disengaged, allowing the outer post 101 to axially slide along the inner post 102. It's by this way the height of frame structure can be adjusted to adapt to the ceiling constrains of an indoor environment.

FIG. 12 further shows the construction details of the height adjustor 600 in the preferred embodiments, through a combination of orthographic, sectional and perspective views.

FIG. 13 shows a perspective view of the wall truss 200 connected to the post cap brackets 103 and post slider brackets 500 on both ends in the first preferred embodiment.

FIG. 14 illustrates how the wall truss 200 may be put together in the first preferred embodiment. The wall truss 200 may comprise a plurality of arms, thereof each of the plurality of arms may consist of a pair of longitudinal members 201 preferably equal length. The pair of longitudinal members 201 may be pivotally interconnected in the middle to form a scissor linkage, via fastener 205 (FIG. 26 ), connector 202 (FIG. 23 ), sleeve 203 (FIG. 24 ) and fastener 206 (FIG. 27 ). Each of the plurality of arms may be further pivotally connected to each other end-to-end in tandem via fasteners 205, connectors 202, connectors 204 (FIG. 25 ) and fasteners 206, forming crisscross connections and leaving the wall truss 200 with two open ends. On each open end of the wall truss 200 the end portion of the longitudinal member 201 projecting upward may be pivotally connected to the corresponding first or second wall truss slots on the respective post cap bracket 103 via fastener 207 (FIG. 28 ), and the end portion of the longitudinal member 201 projecting downward may be pivotally connected to the corresponding first or second wall truss slots on the respective post slider bracket 500 via fastener 207.

When the post slider bracket 500 moves up closer to or moves down away from the post cap bracket 103, the crisscross connections in conjunction with the scissor linkages allow the paired-up longitudinal members 201 to extend or contract in synchronization.

FIG. 15 further illustrates how a clear sheeting 2000 may be sandwiched between the longitudinal members 201 and a plurality of spring clips 208 (FIG. 16 , FIG. 17 ) whereby attached to the frame structure in the first preferred embodiment.

FIG. 16 and FIG. 17 show the front and rear perspective views of a spring clip 208 having a similar to “C” shape body in the preferred embodiments. In some embodiments various shapes or various clamping devices may be employed to achieve the same objective.

FIG. 18 shows a perspective view of a fully extended roof truss 300 connected to a roof connector assembly 400 on one end, a post cap bracket 103 and a post slider bracket 500 on the other end in the first preferred embodiment.

FIG. 19 illustrates how the roof truss 300 may be put together in the first preferred embodiment. The roof truss 300 may comprise a pair of arms. Each of the pair of arms may further comprise a first longitudinal member 301 (FIG. 29 ) and a second longitudinal member 302 (FIG. 30 ), whereof the first longitudinal member 301 may be preferably longer than the second longitudinal member 302. The second longitudinal member 302 may be pivotally connected to the middle of the first longitudinal member 301 on one end via fastener 205 (FIG. 26 ), connector 303 (FIG. 31 ) and fastener 206 (FIG. 27 ), forming a brace linkage. Each first longitudinal member 301 from the pair of arms may be pivotally connected to each other end-to-end via fastener 205, rotation limit connector 304 (FIG. 32 ) and fastener 206, leaving the roof truss 300 with two open ends. On one open end of the roof truss 300, the end portion of the first longitudinal member 301 may be pivotally connected to the corresponding roof truss slot on the respective post cap bracket 103, and the end portion of the second longitudinal member 302 may be pivotally connected to the corresponding roof truss slot on the respective post slider bracket 500. On the other open end of the roof truss 300, the end portion of the first longitudinal member 301 may be pivotally connected to a corresponding slot on the roof cap connector 401 (FIG. 21 ) via fastener 205 and fastener 206; and the end portion of the second longitudinal member 302 may be pivotally connected to a corresponding slot on the slidable connector 404 (FIG. 21 ) via fastener 205 and fastener 206.

The rotation limit connector 304 (FIG. 32 ) may comprise a similar to squared “C” shape body on one end having a circular hole on the vertical wall of the squared “C” shape body, and a “L” shape body on the other end, whereof the “L” shape body and the squared “C” shape body are in tandem and back-to-back oriented. Two first longitudinal members 301 may be pivotally connected to each other end-to-end on both sides of the circular hole, and the “L” shape body may limit the rotation of the respective first longitudinal member 301 sitting advantageously above the bottom plate of the “L” shape body.

When the post slider bracket 500 moves up closer to or moves down away from the post cap bracket 103, the second longitudinal member 302 pushes the respective first longitudinal member 301 to extend or contract in synchronization, whereby the second longitudinal member 302 supports the overhanging roof truss 300 from the telescopic post 100.

FIG. 20 shows the construction details of the roof connector assembly 400 in the preferred embodiments, through a combination of orthographic, sectional and perspective views.

FIG. 21 illustrates how the roof connector assembly 400 may be put together in the preferred embodiments. The roof connector assembly 400 may comprise a roof cap connector 401, a pole cap 402, a slidable connector 403, a position limit flange 404 having a flat ring encompassing a hollow tubular passage sized and shaped to receive the roof pole 405, a roof pole 405 having a twin-tip pin, and a handle 406. The roof pole 405 may be attached to the pole cap 402 on the top by means of suitable chemical bonding agent or fasteners, the position limit flange 404 in the middle via fasteners 104, and the handle 406 on the bottom via fasteners 104, forming a roof pole assembly.

The roof cap connector 401 may comprise a hollow recess sized and shaped to receive said roof pole assembly from below, and a plurality of horizontal slots radially oriented, encompassing the upper portion of the hollow recess. Each of the plurality of horizontal slots may be pivotally connected to the end portion of the first longitudinal member 301 from the respective roof truss 300. The roof cap connector 401 may further comprise a pair of locking slots penetrating the opposite side of the lower recess body, whereof a locking slot of the pair of locking slots may contain a horizontal path connected by a long vertical path having an opening to the rim of the recess opening on one end and a short vertical path on the other end.

The slidable connector 403 may comprise a hollow tubular passage sized and shaped to slidably receive the roof pole 405, and a plurality of horizontal slots radially oriented, encompassing the hollow tubular passage. The slidable connector 403 may be installed coaxially onto the roof pole assembly and slidable between the twin-tip pin and the position limit flange 404. Each of the plurality of horizontal slots may be pivotally connected to the end portion of the second longitudinal member 302 from the respective roof truss 300. The plurality of slots on the roof cap connector 401 are matched and paired up with the plurality of slots on the slidable connector 403 to be connected to the roof trusses 300.

To pop up the roof, a user may push up the handle to lock the roof pole 405 in the roof cap connector 401 by guiding the twin-tip pin through the openings of the long vertical paths and the horizontal paths to the short vertical paths. The tubular shape of the roof pole 405 in the preferred embodiments is a cylinder. However, in some embodiments various tubular shapes may be used.

FIG. 22 shows a perspective view of the longitudinal member 201 of the wall truss 200 having two circular holes placed on both ends and a circular hole in the middle of the body that may be used in the first preferred embodiment.

FIG. 23 shows a perspective view of the connector 202 having a circular hole in the middle of the body that may be used in the first preferred embodiment.

FIG. 24 shows a perspective view of the sleeve 203 having a circular hole through the body in the middle that may be used in the first preferred embodiment.

FIG. 25 shows a perspective view of the connector 204 having a circular hole in the middle of the body in the first preferred embodiment.

FIG. 26 shows a perspective view of the fastener 205 that may be used in the first preferred embodiment.

FIG. 27 shows a perspective view of the fastener 206 that may be used in the first preferred embodiment.

FIG. 28 shows a perspective view of the fastener 207 that may be used in the first preferred embodiment.

FIG. 29 shows a perspective view of the first longitudinal member 301 of the roof truss 300 having two circular holes placed on both ends and a circular hole in the middle of the body that may be used in the first preferred embodiment.

FIG. 30 shows a perspective view of the second longitudinal member 302 of the roof truss 300 having two circular holes placed on both ends that may be used in the first preferred embodiment.

FIG. 31 shows a perspective view of the connector 303 containing two parallel slots having a hole through both slots in the middle of the body that may be used in the first preferred embodiment.

FIG. 32 shows a perspective view of the rotation limit connector 304 having a similar to squared “C” shape body on one end, a hole on the vertical wall of the squared “C” shape body, and a “L” shape body on the other end that may be used in the first preferred embodiment.

FIG. 33 shows a perspective view of the fastener 104 that may be used in the first preferred embodiment.

FIG. 34 illustrates how the cover retaining assembly 800 may be put together in the preferred embodiments. The cover retaining assembly 800 may comprise a male mounting clamp 801 having a walled body similar to a bottle shape that is sized be mounted on the telescopic post 100, a female mounting clamp 802 having a walled body similar to a bottle shape that is sized and shaped to be clamped on the male mounting clamp 801, and a U shape spring clip 803. The walled body of the male mounting clamp 801 may comprise an opening forming the bottleneck of the bottle, two parallel lateral portions forming both sides of the bottle body, a bridging portion forming the bottom of the bottle. Each of the two parallel lateral portions may further include an outer toothed surface and an inner flat surface. The female mounting clamp 802 may have similar construction as the male mounting clamp 801, except each of two parallel lateral portions of the female mounting clamp 802 may have an outer flat surface and an inner toothed surface. The teeth on the male mounting clamp 801 are designed to be engaged with the teeth on the female mounting clamp 802 to form gripping surfaces. The female mounting clamp 802 may further contain a pair of round slots on both outer ends of the opening to receive the U shape spring clip 803, which can be, but need not be, used to reinforce the connection to the male mounting clamp 801.

FIG. 35 further shows how a clear sheeting 2000 may be sandwiched in the cover retaining assembly 800, whereby attached to the telescopic post 100 in the preferred embodiments. To attach the sheeting 2000 to the telescopic post 100, the opening of the male mounting clamp 801 may be expanded to slide over the telescopic post 100, the male mounting clamp 801 may be then mounted on the telescopic post 100 via fastener 804 and fastener 805; thereof the sheeting 2000 may cover the telescopic post 100; thereof the opening of the female mounting clamps 802 may be expanded so that the female mounting clamp 802 can be pushed over the sheeting 2000 to engage the male mounting clamp 801; whereby the sheeting 2000 may be sandwiched between the gripping surfaces. The preferred tooth shape is triangle in the preferred embodiments, however, in some embodiments, tooth and body shape variations may be made to both male mounting clamp 801 and female mounting clamp 802 to adapt to various tubular shapes of the telescopic leg 100 and achieve like results.

FIG. 36 shows the construction details of the cover retaining assembly 800, through a combination of orthographic, sectional and perspective views.

FIG. 37 illustrates how the ventilation assembly 700 may be put together in the preferred embodiments. The ventilation assembly 700 may comprise a bottom plate 701 having a slotted surface, a pair of wall plates 702 thereof each having a slotted surface, a cap plate 703 having a slotted surface, a vent hose adapter plate 704 having a collar surrounding a penetrating hole sized and shaped to receive a standard vent hose, and an air filter 705 sourced from commercially available standard furnace air filters. The pair of wall plates 702 may be vertically jointed to the base plate 701 end-to-end on the bottom, and the cap plate 703 end-to-end on the top with all slotted surfaces facing inward, by a plurality of corner connectors 706 and a plurality of fasteners 104 to form an enclosure and an airway. The inward slotted surfaces may form a frontal slot for receiving the air filter 705, a middle slot for receiving the vent hose adaptor plate 704 and a rear slot for receiving either a customized plate or the vent hose adaptor plate 704, so that the air way may be blocked by the air filter 705 and either the vent hose adaptor plate 704 or the customized plate. One of the pair of wall plates 702 may be further connected to a connector 1001 (FIG. 39 ) from the ventilation connector assembly 1000 via fasteners 1002 and fasteners 206 (not shown here but shown on FIG. 39 ).

FIG. 38 shows a front perspective view of the ventilation assembly 700 attached to the inner post 102 via the ventilation connector assembly 1000 in the preferred embodiments.

FIG. 39 illustrates how the ventilation connector assembly 1000 may be put together in the preferred embodiments. The ventilation connector assembly 1000 may comprise a connector 1001 and a connector 901. The connector 1001 may contain a “T” shape body consisting of a flat surface body forming the top of the “T” and a ridge body having a hollow cylinder at the end forming the post of the “T”. The flat surface body of the connector 1001 may contain two circular holes on both sides of the ridge body, and may be attached to a wall plate 702 via fasteners 1002 and fasteners 206. The bracket end of the connector 901 may be clamped on the respective inner post 102 via fastener 903 and fastener 1003. The ventilation assembly 700 may then be attached to the respective inner post 102 when the hinge of the connector 901 is inserted into the hollow cylinder of the connector 1001. A user may cut an opening matching the size of the air filter 705 on the wall cover and attach the opening to the ventilation assembly 700 via suitable means to expose the air filter 705. The ventilation assembly 700 may then work in conjunction with other equipment to force air in the workspace to circulate through the air filter 705, and provide ventilation to the worksite if needed. In the preferred embodiments, the ventilation assembly 700 is preferably an enclosure. However, in some embodiments the ventilation assembly may consist of a frame structure.

FIG. 40 shows a rear perspective view of the ventilation assembly 700 from the opposite direction of FIG. 38 . A vent hose from a force air circulation system may be attached to the collar of the vent hose adapter plate 704.

FIG. 41 illustrates a commercially available square fan 2100 may be utilized inside the ventilation assembly 700 to force air circulation.

FIG. 42 illustrates a commercially available bathroom exhaust fan 2200 may be utilized alongside with the ventilation assembly 700 to force air circulation. A flat plate that has commensurate sizes of the vent hose adapter plate 704 may be made to have a cut-out to the size of the bathroom exhaust fan 2200 inlet, and seal the inlet into the ventilation assembly 700. The bathroom exhaust fan 2200 may further be secured to a piece of lumber 2300.

FIG. 43 illustrates a single unit of the present inventive system in fully configured and deployed state in the first preferred embodiment. The frame structure may be popped up without tools. A desired frame structure height may be set. A user may first cover the roof with clear sheeting, then wraps another clear sheeting along the telescopic posts 100 to form the walls via a plurality of cover retaining assemblies 800, starting from the front left telescopic post as the first telescopic post, to the left one in the rear as the second telescopic post, to the right one in the rear as the third telescopic post, and the front right one as the fourth telescopic post. The overlapping portion of the roof cover and wall cover may be secured to the longitudinal members 201 via a plurality of spring clips 208 as shown on FIG. 15 . The clear sheeting may then form an entry cover between the first post and the fourth post. The top of the entry cover may be secured to the longitudinal members 201 on the top of the entry via a plurality of spring clips 208. A user may enter the workspace through the entry, then seal off the workspace by using a plurality of spring clamp 1100 to attach the open side of the entry cover to the first telescopic post 100 from inside. The ventilation assembly 700 may be attached to the second telescopic post along the geometric footprint if needed. A ground cover may also be used to cover the ground of the worksite if needed.

FIG. 44 shows a perspective view of the spring clamp 1100 having a pair of jaws with inward teeth sized and shaped to be clamped on the telescopic post 100 in the preferred embodiments.

FIG. 45 illustrates how the spring clamp 1100 may be put together in the preferred embodiments. The spring clamp 1100 may comprise a first lever 1101, a second lever 1102, a spring 1103 and a hinge 1104. The first lever 1101 may further comprise a body having a jaw side with toothed surfaces on one end, a pair of hinge seats in the middle, and a handle side on the other end. The second lever 1102 may have mostly same construction as the first lever 1101, except a pair of hinge seats on the second lever 1102 may be spaced with an offset to couple with the pair of hinge seats on the first lever 1101 to form a pivot. The first and second levers may be then pivotally interconnected by the spring 1103 and the hinge 1104 at the pivot, forming a pair of jaws with teeth and a pair of handles. A cover may be then sandwiched between the telescopic post 100 and the spring clamp 1100. The teeth on the jaws of the spring clamp 1100 provide enhanced grip advantageously to the connection. In the preferred embodiments the spring clamp 1100 is preferably used to close the entry. However, in some embodiments the spring clamp 1100 may be interchangeable with the cover retaining assembly 600 to attach a cover to the telescopic post 100.

FIG. 46 shows a perspective view of the frame structure in the deployed position in the second preferred embodiment. The frame structure of the second preferred embodiment may comprise mostly the same components and structure as the frame structure in the first preferred embodiment, except a second type roof truss 1300 replacing the roof truss 300 may now be pivotally connected to the middle of a second type wall truss 1200 replacing the roof truss 200, instead of the telescopic post 100; a second type of post cap bracket 105 (FIG. 48 ) may now replace the post cap bracket 103; a second type of post slider bracket 1500 (FIG. 49 ) may now replace the post slider bracket 500; a first T connector 1201 (FIG. 50 ) and a second T connector 1202 (FIG. 51 ) may also be employed to complete the new connections. The frame structure in the second preferred embodiment may continue to employ the spring clip 208, the ventilation assembly 700, the cover retaining assembly 800, the frame linkage assembly 900, the ventilation connector assembly 1000 and the spring clamp 1100 to fulfill like functions as in the first preferred embodiment.

FIG. 47 illustrates how the second type wall truss 1200 and the second type roof truss 1300 may be put together in the second preferred embodiment. The second type wall truss 1200 may comprise a first arm, a second arm, a first T connector 1201 (FIG. 50 ) and a second T connector 1202 (FIG. 51 ). The first T connector 1201 may further comprise a wall truss slot forming the top of the “T” and a slightly off-center roof truss slot forming the post of the “T”. The second T connector 1202 may have mostly the same construction as the first T connector 1201 except its roof truss slot may be preferably shorter than the roof truss slot of the first T connector 1201. Each of the first and second arms may further comprise a pair of longitudinal members 201 preferably equal length. Each pair of longitudinal members 201 may be pivotally interconnected in the middle to form a scissor linkage via fasteners. The first and second arms may be pivotally connected to each other end-to-end forming crisscross connection, via the first T connector 1201 on the top connecting two adjacent longitudinal members 201 facing outward of the geometric footprint, and the second T connector 1202 on the bottom connecting two adjacent longitudinal members 201 facing inward of the geometric footprint, leaving the roof truss slots on the first and second T connectors projecting inward of the geometric footprint and the second type wall truss 1200 with two open ends. One each open end of the second type wall truss 1200, the end portion of the longitudinal member 201 projecting upward may be pivotally connected to the corresponding slot on the respective second type post cap bracket 105 (FIG. 48 ), the end portion of the longitudinal member 201 projecting downward may be pivotally connected to the corresponding slot on the respective second type post slider bracket 1500 (FIG. 49 ).

The second type roof truss 1300 may comprise an arm preferably having the same components and construction as the first or second arm of the second type wall truss 1200. On one end of the second type roof truss 1300, the end portion of the longitudinal member 201 projecting upward may be pivotally connected to the roof truss slot of the respective first T connector 1201, and the end portion of the longitudinal member 201 projecting downward may be pivotally connected to the roof truss slot of the respective second T connector 1202. On the other end of the second type roof truss 1300, the end portion of the longitudinal member 201 projecting upward may be pivotally connected to one of the plurality of horizontal slots on the roof cap connector 401, and the end portion of the longitudinal member 201 projecting downward may be pivotally connected to one of the plurality of horizontal slots on the slidable connector 403. The paired-up first 1201 and second 1202 T connectors allow the second type wall truss 1200 and the second type roof truss 1300 to expand and contract in synchronization.

FIG. 48 shows perspective views of the second type post cap bracket 105 from different angles in the second preferred embodiment. The second type post cap bracket 105 may have mostly the same construction as the post cap bracket 103, except on the second type post cap bracket 105 the first and second wall truss slots may both be oriented with an offset to its outermost surfaces that form the geometric footprint, and the roof truss slot may be eliminated.

FIG. 49 show perspective views of the second type post slider bracket 1500 from different angles in the second preferred embodiment. The second type second post slider bracket 1500 may have mostly the same components and construction as the post slider bracket 500, except on the second type post cap bracket 105 the first and second wall truss slots may both be oriented flush with its outermost surfaces that form the geometric footprint, and the roof truss slot may be eliminated.

FIG. 50 shows the perspective view of the first T connector 1201 having a circular hole through the end of the roof truss slot that forms the post of the “T”, and two circular holes through the wall truss slot that forms the top of the “T”, on both ends.

FIG. 51 shows the perspective view of the second T connector 1202 having mostly same construction as the first T connector 1201, except the roof truss slot is shorter.

Although the preferred embodiments of the present inventive system have been described. A person skilled in the art, however, will recognize that many other embodiments are possible within the scope of the claimed invention to achieve like functions and results. For this reason, the scope of the present invention is not to be determined from the descriptions of the preferred embodiments, and accordingly all suitable modifications and equivalents may be resorted to, falling within the scope of the invention.

The words “having”, “containing”, “comprising”, “including”, “contain”, “comprise”, “include”, “has”, “have” are intended to be open-ended to indicate an item or items indicated following these words is not an exhaustive list of such item(s), or meant to be limited to such item(s) only. 

I claim:
 1. A scalable and portable worksite frame structure comprising: first, second, third and fourth telescopic posts standing vertically on the ground, wherein the outermost surfaces of said first, second, third and fourth telescopic posts form a closed loop geometric footprint, wherein said telescopic posts define the vertices of said geometric footprint and are extendable and retractable; at least one wall truss having a plurality of longitudinal members operably and transversely attached to and between adjacent said first, second, third and fourth telescopic posts forming a closed loop wall frame structure, wherein said at least one wall truss is extendable and foldable; a roof connector assembly disposed centrally of said geometric footprint; at least one roof truss having a plurality of longitudinal members operably and transversely attached to and between said roof connector assembly and said wall frame structure forming a roof, wherein said at least one roof truss is extendable and foldable; wherein said frame structure includes a deployed position whereof said telescopic posts are extended vertically, said at least one wall truss and said at least one roof truss are extended transversely; wherein a worksite is scaled up by linking two said frame structures in said deployed position side by side; and wherein said frame structure includes a folded position whereof said telescopic posts are retracted, said at least one wall truss and said at least one roof truss are folded and bunched together in compact storage form.
 2. The scalable and portable worksite frame structure as in claim 1, wherein said roof connector assembly further comprises: a roof pole assembly having a roof pole and a handle at the bottom; a roof cap connector having a recess sized and shaped to receive said roof pole assembly from below, and a plurality of slots radially oriented encompassing said recess; a slidable connector having a tubular passage sized and shaped to slidably receive said roof pole, and a plurality of slots radially oriented encompassing said tubular passage; wherein said slidable connector is slidably attached to said roof pole assembly and slidable along the upper portion of said roof pole; wherein said plurality of slots on said roof cap connector are matched and paired up with said plurality of slots on said slider connector to connect with respective said at least one roof truss; and wherein said roof pole assembly is stationarily attached to said roof cap connector in said deployed position.
 3. The scalable and portable worksite frame structure as in claim 1, wherein said at least one roof truss is operably and transversely connected to and between said roof connector assembly and the top ends of said first, second third and fourth telescopic posts.
 4. The scalable and portable worksite system as in claim 3, wherein a telescopic post of said first, second third and fourth telescopic posts further comprises: an outer post having a tubular body; an inner post sized and shaped to be slidably received into said outer post; a post cap bracket further comprising a hollow recess sized and shaped to receive the top end of said outer post, and a plurality of slots radially projecting outward from said hollow recess including a first wall truss slot, a second wall truss slot and a roof truss slot; wherein said first and second wall truss slots are oriented lengthwise in accordance to said geometric footprint and said roof truss slot is oriented radially between said first and second wall truss slots; wherein said hollow recess is affixed to the top of said outer post; a post slider bracket having a hollow tubular passage sized and shaped to slidably receive said outer post, and a plurality of slots radially projecting outward from said hollow tubular passage including a first wall truss slot, a second wall truss slot and a roof truss slot; wherein said first and second wall truss slots are oriented lengthwise in accordance to said geometric footprint and said roof truss slot is oriented radially between said first and second wall truss slots; wherein said outer post slidably receives said inner post to form the telescopic structure, wherein said first, second third and fourth telescopic posts are extendable and retractable in height; and wherein said post slider bracket is slidably attached to said outer post and slides along the outer surface(s) of said outer post when extending or folding said frame structure.
 5. The scalable and portable worksite frame structure as in claim 3, wherein said at least one wall truss further comprises at least one arm having a first and a second longitudinal members that are equal length, thereof said first and second longitudinal members are pivotally interconnected in the middle to form a scissor linkage; wherein said at least one arm further comprises a first arm, a second arm and a third arm, thereof said first, second and third arms are further pivotally connected end-to-end in tandem forming crisscross connections, and leaving said at least one wall truss with two open ends; wherein on each open end of said at least one wall truss a longitudinal member of said first and second longitudinal members projecting upward is pivotally connected to corresponding said first or second wall truss slot on respective said post cap bracket; and wherein on each open end of said at least one wall truss a longitudinal member of said first and second longitudinal members projecting downward is pivotally connected to corresponding said first or second wall truss slot on respective said post slider bracket.
 6. The scalable and portable worksite frame structure as in claim 3, wherein said at least one roof truss further comprises at least one arm having a first and a second longitudinal members, thereof said second longitudinal member is shorter than said first longitudinal member, and is pivotally connected to the middle of said first longitudinal member on one end, forming a brace linkage; wherein said at least one arm further comprises a first arm and a second arm; wherein said first longitudinal member of said first arm is pivotally connected to corresponding said roof truss slot of respective said post cap bracket on one end, and said first longitudinal member of said second arms on the other end; wherein said first longitudinal member of said second arm is pivotally connected to one of said plurality of slots on said roof cap connector on the other end; wherein said second longitudinal member of said first arm is pivotally connected to corresponding said roof truss slot on respective said post slider bracket on the other end; wherein said second longitudinal member of said second arm is pivotally connected to one of said plurality of slots on said slidable connector on the other end.
 7. The scalable and portable worksite frame structure as in claim 1, wherein said at least one roof truss is operably and transversely connected to and between said roof connector assembly and the midpoint of said at least one wall truss.
 8. The scalable and portable worksite frame structure as in claim 7, wherein a telescopic post of said first, second third and fourth telescopic posts further comprises: an outer post having a tubular body; an inner post sized and shaped to be slidably received into said outer post; a post cap bracket further comprising a hollow recess sized and shaped to receive the top end of said outer post, and a plurality of slots radially projecting outward from said hollow recess including a first wall truss slot and a second wall truss slot; wherein said first and second wall truss slots are oriented lengthwise in accordance to said geometric footprint; wherein said post cap bracket is affixed to the top of said outer post; a post slider bracket having a hollow tubular passage sized and shaped to slidably receive said outer post, and a plurality of slots radially projecting outward from said hollow tubular passage including a first wall truss slot and a second wall truss slot; wherein said first and second wall truss slots are oriented lengthwise in accordance to said geometric footprint; wherein said outer post slidably receives said inner post to form the telescopic structure, wherein said first, second third and fourth telescopic posts are extendable and retractable in height; and wherein said post slider bracket is slidably attached to said outer post and slides along the outer surface(s) of said outer post when extending or folding said frame structure.
 9. The scalable and portable worksite frame structure as in claim 7, wherein said at least one wall truss further comprises at least one arm having a first and a second longitudinal member that are equal length, thereof said first and second longitudinal members are pivotally interconnected in the middle to form a scissor linkage; wherein said at least one arm further comprises a first arm and a second arm, thereof said first and second arms are further pivotally connected end-to-end, forming crisscross connection between said first and second arms, an upper midpoint junction and a lower midpoint junction, and leaving said at least one wall truss with two open ends; wherein on each open end of said at least one wall truss a longitudinal member of said first and second longitudinal members projecting upward is pivotally connected to corresponding said first or second wall truss slot on respective said post cap bracket, and a longitudinal member of said first and second longitudinal members projecting downward is pivotally connected to corresponding said first or second wall truss slot on respective said post slider bracket.
 10. The scalable and portable worksite frame structure as in claim 7, wherein said at least one roof truss further comprises at least one arm having a first and a second longitudinal member that are equal length, thereof said first and second longitudinal members are pivotally interconnected in the middle to form a scissor linkage, and leaving said at least one roof truss with two open ends; wherein on one open end of said at least one roof truss a longitudinal member of said first and second longitudinal members projecting upward is pivotally connected to corresponding said upper midpoint junction of said at least one wall truss, and a longitudinal member of said first and second longitudinal members projecting downward is pivotally connected to corresponding said lower midpoint junction of said at least one wall truss; wherein on another open end of said at least one roof truss a longitudinal member of said first and second longitudinal members projecting upward is pivotally connected to one of said plurality of slots on said roof cap connector, and a longitudinal member of said first and second longitudinal members projecting downward is pivotally connected to one of said plurality of slots on said slidable connector.
 11. A ventilation system comprising: an air filter; a vent hose adaptor plate having a collar surrounding a circular hole; an enclosure further comprising a base plate, at least one wall plate and a cap plate; wherein said at least one wall plate further comprises a first wall plate and a second wall plate; wherein said first wall plate and second wall plates are vertically connected to said base plate end-to-end on the bottom and said cap plate end-to-end on the top to form said enclosure and an airway; wherein said enclosure receives said air filter and said vent hose adaptor plate to block said airway; wherein to utilize an existing external blower, said air filter and said vent hose adaptor plate are received into said enclosure, and a vent hose is used to connect said external blower to the collar of said vent hose adaptor plate; wherein to utilize an existing blower fan, said air filter is received into said enclosure and said blower fan is placed inside said enclosure; and wherein to utilize an existing bathroom exhaust fan, said air filter is received into said enclosure, and a customized plate is made to be received into said enclosure to seal the inlet of said bathroom exhaust fan into said enclosure.
 12. A cover retaining system comprising: a male mounting clamp having a walled body configured to be mounted on a post of a frame structure, thereof said walled body has a continuous vertical wall shaped like a bottle, which includes an opening forming the bottle neck of the bottle, followed by two lateral portions forming both sides of the body of the bottle, followed by a bridging portion forming the bottom of the bottle; wherein each of said two lateral portions has an outer toothed surface parallel to each other; wherein said opening is expanded to slide over said post so that said post is embraced between the inner surfaces of said two lateral portions; wherein inward pressure can be applied on both ends of said opening by fastening device so that said male mounting clamp is mounted on said post; a female mounting clamp having a walled body configured to be clamped on said male mounting clamp, thereof said walled body has a continuous vertical wall shaped like a bottle and sized and shaped to cover over said male mounting clamp, which includes an opening forming the bottle neck of the bottle, followed by two lateral portions forming both sides of the body of the bottle, followed by a bridging portion forming the bottom of the bottle; wherein each of said two lateral portions has an inner toothed surface parallel to each other; wherein said opening is expanded to slide over said male mounting clamp so that said inner toothed surfaces of said female mounting clamp are engaged with said outer toothed surfaces of said male mounting clamp, forming griping surfaces; wherein a sheeting is sandwiched between said gripping surfaces, whereby said sheeting is secured to said post. 